<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<title>Insert title here</title>

	<script type='text/javascript' src='<%=request.getContextPath() %>/dwr/engine.js'> </script>
    <script type='text/javascript' src='<%=request.getContextPath() %>/dwr/util.js'> </script>
    <script type='text/javascript' src='<%=request.getContextPath() %>/dwr/interface/contactBusiness.js'></script>

<script>

function update() {
  contactBusiness.showHelloWorld(function(data) {
    alert(data);
  });
}

</script>

</head>
<body>
<input type="button" onclick="update()" value="检查是否重复">
</body>
</html>